Audio amplifier



FIG. 1 is a perspective view of an audio amplifier;

FIG. 2 is a front elevational view of the audio amplifier;

FIG. 3 is a rear elevational view of the audio amplifier;

FIG. 4 is a top plan view of the audio amplifier;

FIG. 5 is a bottom plan view of the audio amplifier;

FIG. 6 is a right side elevational view of the audio amplifier;

FIG. 7 is a left side elevational view of the audio amplifier;

FIG. 8 is an enlarged view of a portion of the audio amplifier takenalong lines 8-8 in FIG. 1 ;

FIG. 9 is an enlarged front elevational view of the audio amplifier;

FIG. 10 is an enlarged view of a portion of the audio amplifier takenalong lines 10-10 in FIG. 4 ;

FIG. 11 is a front elevational view of the audio amplifier shown in astate of use; and,

FIG. 12 is a perspective view of the audio amplifier shown in a state ofuse.

Portions of the audio amplifier shown in broken lines form no part ofthe claimed design. The audio amplifier is shown with symbolic breaks inits length in FIGS. 8 and 10 that are shown in broken lines that form nopart of the claimed design. The appearance of any portion of the articlebeyond the break lines forms no part of the claimed design.

CLAIM The ornamental design for an audio amplifier, as shown anddescribed.